Q:

# What is a nine-sided shape called?

A:

A nonagon is a closed shape that has nine sides. If it is a regular nonagon, all nine sides are the same length, and all the angles are equal.

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The sum of the interior angles of a nonagon is 1260 degrees. If it is a regular nonagon, then all nine angles have the same measurement of 140 degrees.

The term "nonagon" was coined during the 17th century from a combination of words. It begins with the Latin word "nonus," which means "nine." The last part of the word "gon" is patterned after Latin and Greek words meaning "angle. " Literally translated, "nonagon" means "nine angles."

## Related Questions

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A nonagon is a nine-sided polygon in geometry. The Latin prefix "nonus" means "ninth." Like many polygons, nonagons can be regular or irregular. Regular nonagons have nine equal sides and nine interior angles equal to 140 degrees each. On the other hand, irregular nonagons have nine sides and angles that do not have to match, so they can be drawn in any way.

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• A:

A six-sided polygon is called a hexagon. A polygon is an enclosed figure with straight lines that do not cross over one another. Polygons do not necessarily have equal sides. A convex polygon has all angles pointing outward, but in a concave polygon, some angles can point inward.

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• A:

A four-sided polygon is called a quadrilateral. "Quad" means four and "lateral" means side, so quadrilateral truly means four sides. The internal angles in a quadrilateral add up to 360 degrees.